Machine for pointing and threading pieces of wire



3 Sheets-Sheet 1.

(Nb Model.) 7

A. H. HAMMOND.

MACHINE POE POINTING AND THEEADING PIECES OF WIRE.

No. 372,412. Patented Nov. 1, 1887.

INVENTDR .5 E 5 5. E N w w.

N. PETERS, Pholo-Lilhognphan Washington, n.c

(No Model.) 3 sheetssheet 2.

A. H. HAMMOND. MACHINE FOR POINTING AND THREADING PIECES OF WIRE.

N0.'372,412 Patented NovQl, 1887.

I I 1 I I" a I (No Model'.) 1 3 Sheets-Sheet 3.

A. H. HAMMOND. MACHINE FOR POINTING AND THREADING BIB-CBS 0F WIRE.

Pa gented Nov. 1

WlTN ESEES (ZZZ Pnowulmgn har, Wavluingtnn, n C

ary point-rolling die and the stationary screw- UNITED STATES PATENT OFFICE.

ANDRINV I-I. HAMMOND, OF \VOROESTER, MASSACHUSETTS.

MACHINE FOR POINTING AND THREADING PIECES OF WIRE.

SPECIFICATION forming part of Letters Patent No. 372,412, dated November 1, 1887.

Application filed May 18, 1887.

To all 1071,0722, it may concern.-

Be it known that 1, ANDREW H. HAMMOND, a citizen of the United States, residing at \Vorcester, in the county of \Vorcester and State of Massachusetts, have invented certain new and useful Improvements in the Manufacture ofPointed and Threaded Pins; and I do hereby declare that the following is a full, clear, and exact description thereof, which, in connection with the drawings making a part of this specification, will enable others skilledin the art to which my invention belongs to make and use the same.

Myinvention relates to the manufacture of pointed and threaded pins or pieces of wire, and to mechanism for making the same; and my invention consists in an improved way of making the points on one or both ends of the pinsto wit, rolling them thereon-and in mechanism adapted to roll the points on said pins and to roll a screw-th read thereon, as will be hereinafter fully described.

In the machine shown I employ mechanism for intermittently feeding in the wire to be operated upon and mechanism for cutting off the wire on a bevel, mechanism for rollingapoint on each end of the wire cut off, and mechanism for rolling a screw-thread thereon, and means for operating said mechanisms automatically, in the manner to be hereinafter fully described.

Referring to the drawings, Figure 1 is a plan of the machine, showing a portion of the driving-pulley and the operatinggears. Fig. 2 is a side elevation of the machine shown in Fig. 1, looking in the direction of arrow a, same figure, the base or standard of the machine being broken away, and the device for clamping the wire in the process of feeding it in being shown partially broken away. Fig. 3 is a front elevation of the machine, a portion of the revolving point-rolling die being broken away to more clearly illustrate one feature of the machine, to be hereinafter described. Fig. 4 is a detail of the point-rolling dies. Fig. '5 is a detail of the screw-thread-rolling dies. Fig. 6 is a detail of the cutter for cutting off the wire and of the mechanism for operating the same, to be hereinafter described. Fig. 7 represents a modified form of the mechanism for supporting and adjustingthe station- Serial No. 238,605. (No model.)

thread-rolling die, to be described hereinafter; and Figs. 8, 9, and represent on an enlarged scale the stages of manufacture of the pointed pins or screw-threaded pieces of wire made by the machine shown in the drawings.

In the accompanying drawings, 1 is the standard or base of the machine, intended to be firmly secured to the floor.

2 is the bed of the machinc,npon which are supported the operating parts thereof.

3 is the driving-pulley, supported and turn ing on a stud, 4L, mounted in the bed 2 of the machine at one side thereof.

A pinion, 5, is secured to the hub of the pulley 3 and revolves with said pulley. The pinion 5 meshes into and operates the gear 6, supported upon a stud secured in the bed 2. A pinion, 7, secured to and revolving with the gear 6, meshes into and operates the two pinions 8 and 9, secured, respectively, upon the ends of the shafts 10 and 11 of the revolving circular point-rolling and screw-thread-rolling dies 12 and 13.

Upon the shaft 11 of the revolving circular screw-thread-rolling die 13 is secured a cam, 14, for operating intermittently, through the lever 15, pivoted at 16 on the cross-bar 17 or the bed of the machine, the mechanism for drawing in the wire 18 to be operated upon, and which in this instance consists of a carriage, 19, adapted to slide back and forth upon ways formed upon or secured to the bed 2,and carrying a stud, 20, upon which is pivoted a pawl, 21, the upper part of which extends loosely through a slot in the lever 15, and the lower part has aprojection or jaw, 21, formed onits forward end, and a vertical slot in its rear end, adapted to straddle loosely the wire 18 and to retain the same in place upon the carriage 19.

The operation of the mechanism for drawing in the wire above described will be readily understood by those skilled in the art, and is as follows: The revolution of the cam 14, secured on the shaft 11, causes the lever to move back and forth, and with it the carriage 19, through the intervention of the pawl 21, pivoted thereon. The forward motion of the lever 15 at its front end-that is, in the direction of arrow I), Figs. 1 and 2-causes the pawl 21 to be tilted forward on its supportingstud 20, secured on the carriage 19, and the IOU ing to revolve, allows the spring 22, secured a at one end to the bed 2 and at the other end to the lever 15, to act to draw back said lever, and with it the carriage 19. The backward motion of thelever causes the pawl 21 to be tilted backward and the jaw 21 to be raised from the wire 18, thus releasing the wire and leaving it stationary during the back ward motion of the carriage 19. The slot in the rear end of the lower part of the pawl 21, through which the wire 18 passes, is sufficiently deep so as not to grip or clamp the wire to the carriage 19 when said pawl is tilted backward. It will thus be seen that the wire 18, taken from 'a coil not shown in the drawings, is drawn or fed into the machine intermittently at regular intervals to be operated upon. The forward end of the wire 18, as said wire is fed forward, as above described, passes through and projects out from the beveled end of the tube or guide 23, and extends over and rests upon the platform 25, supported and secured upon astud, 26, projecting out from the bed 2. After the wire 18 is fed forward the desired length it is cut off by the cutter-bar'24,

The vertically-moving cutter-bar 24 is supported in the bed 2 directly over the platform 25,at the point where the wire 18 projects out from the beveled end of the tube 23. Said outter-bar has a circular groove made in its lower end, corresponding to thesize of the wire 18, adapted to hold said wire in position during and after the cutting operation. The inner edge of said cutter'bar is made beveled, corresponding to the bevel on the end of the tube 23, so as to cut off the wire on a bevel, as shown in Fig. 8.

The downward motion of the cutter-bar 24 cuts or shears off on the required bevel the end ot' the wire, 18, projecting out from the tube 23 and extending over the platform 25, as above stated. From the platform 25 the piece of wire cut off rolls onto the face of the revolving circular point-rolling die 12 at the point where the beveling walls or flanges of said die are cut out for that purpose, as shown in Fig. 3, and is then pushed forward to be operated upon' by said die, in the manner to be hereinafter described.

I will now describe the mechanism illustrated in the drawings for operating the cutter-bar 24.

The cutter-bar 24 is supported and adapted to slide up and down in the bed 2, and is operated, so 'as to have a positive intermittent downward motion/Joy means of a pin, 27, extending loosely into a hole in said bar and se-' cured in and projecting out from a shaft, 28,

supported and turning loosely in the bed 2 and a hub, 29, extending out therefrom. A downwardlyprojecting arm, 30, is secured upon the outer end ofthe shaft 28, and is operated by means of a cam, 31, secured upon the shaft 10 of the revolving pointrolling die 12, so as to give a tilting motion to the shaft 28 and cause the cutter-bar 24 to be-drawn down at the proper time by means of the pin 27 against the action of the spring 32, secured to the upper end of the cutter-bar and to the bed 2. (See Figs. 1 and 2.) Said spring 32 serves to raise up the cutter bar after it has been operated to cut off the wire in the manner above described, the continued revolution of the cam 31 releasing the arm 30 and allowing the cutter-bar 24 to be raised.

I will now describe the construction and operation of the dies for rolling points on the pieces of'wire 41, Fig. 8, after they have been cut offon a bevel,as above described, and also of the mechanism for positively feeding said pieces of wire into the action of the point-rolling dies.

A stationary point-rolling die, 33, having its lower end curved and recessed to correspond with the recessed face of the revolving circular point-rolling die 12, to be hereinafter described, is supported in the bed 2 directly over said die 12, and is capable of vertical adjustment up or down by means ofascrew-bolt, 34, provided with a flange or collar, 35, extend ing intoa corresponding groove in the upper end of the stationary die-block 33. (See Figs. 1 and 2.) The revolving circular point-rolling die 12, as before stated, is secured upon the outer end of the shaft 10, and has its face recessed,with walls beveled (see Fig. 4) to correspond to the desired bevel of the point to be made'on the end of the piece ofwire. The pin or piece'of wire 41 is passed between the dies '33 and 12 for the purpose ofrolling a point on each end thereof,as shown in Fig. 9. A cam, 36, is secured upon the shaft 10, adapted'to operate the mechanism for pushing the pieces of wire 41 after they are cut off into the action of the point-rolling dies, and which mechanism consists of a lever, 37, pivoted at its lower end on a pin, 51, in the bed 2, and provided with a push pawl, 38, pivoted in its upper end and located directly under the platform 25 andadapted to rest in the recess in the face of the die 12. A roll, 39, is mounted on a stud, 40, extending out from the outer upper part of the lever 37, and is adapted to roll on the cam -surface 36. The revolution of the cam 36, which revolves with thedie 12, will cause the lever 37 and push'pawl 38 to move back against the action of the spring 42 from the platform 25 onto the-face of the revolving die 12 after the cutting operation, as before stated) into the action of said die in connection with the stationary die 33. In order that the piece of wire 41 dropped down from the platform 25 upon the recessed face of the revolving point-rolling die 12 may be in its proper position to be acted upon by said die in connection with the stationary pointrolling die 33 when pushed forward by the pawl 38 of the lever 37, I employ a stop-bar, 43, which is mounted in the outer edge of the die-block 33, directly over the revolving die 12, with its lower end made beveled and ex tending down in the path of the forward end of the push-pawl 38. Said stop-bar 43 is adapted to move up or down independently of the die-block 33. A stop or gage, 44, is secured upon its upper end to hold said bar 43 in its normal position and limit the downward motion thereof. The office of the stop-bar 43, whose lower beveled end extends directly in the path of the pieces of wire 41 pushed forward by the pawl 38 into the action of the point-rolling dies, is to cause said pieces of wire to assume their proper position in the recess in the face of the revolving die 12 preparatory to passing between said die and the die 33 in the operation of rolling points on the ends thereof. The forward motion of the pawl 38 pushes the piece of wire 41 against the beveled end of the stopbar 43, which serves to straighten its position. Said baris then forced up by the continued forward motion of the pawl 38 out of the path of the piece of wire 41, allowing said piece of wire to be pushed up into the action of the point-rolling dies by the pawl 38, which is then withdrawn and the stop bar 43 returned to its normal position by its own gravity, and this operation is re peated every time that a piece of wire 41 drops from the platform 25 onto the face of the die 12 and is pushed along by the pawl 38 into the action of the point rolling dies. A corresponding stop-bar, 45, provided with a stop or gage. 44, is mounted in the inner edge of the die 33, with its lower end provided with a curved foot or projection extending down directly in the path of the pieces of wire at the point where they are discharged or thrown out from the action of the pointrolling dies. The office of the stop-bar 45 is to break the force of the throw of the pointed piece of wire from between the point-rolling (lies, and at the same time to momentarily stop the same to cause it to be delivered in its proper position onto the movable platform 47, by means of which it is pushed up into the action of the thread-rolling dies, as will be hereinafter described.

The stop-bar 45, above described, only momentarily stops the piece of wire 46, for the revolution of the die 12 carries it along, causing the stop bar 45 to be raised up to allow said piece of wire to pass underit, afterwhich it drops down to its normal position of its own gravity, and this operation is repeated every rolling dies.

time a piece of wire, 46, passes out from the action of the point-rolling dies.

I will now describe the screw-thread-rolling dies and the mechanism connected therewith for raising upthe pieces of wire 46, after they leave the point-rolling dies, into the action of said screw-thread-rolling dies.

A stationary screw-thread-rolling die, 48, is supported in the bed 2 directly over the revolving circular screw-thread-rolling die 13, and is capable of vertical adjustment up or down by means of a screw-bolt, 49, in the same manner as the point-rolling die 33, above described. The lower end of the die 48 is curved to correspond with the curvature of the circular die 13, and is threaded to correspond with the desired pitch of the screwthread to be rolled on the pins or pieces of wire. The revolving circular die 13 has its face threaded in the same manner as the stationary die 48. The pieces of wire 46 are passed between the dies 48 and 13 to roll the screw-thread thereon. The mechanism for pushing up the pieces of wire into the action of the screw-thread-rolling dies after they have been released from the point-r0lling dies is as follows: A lever, 50, ispivoted at one end on a pin, 52, secured in the bed 2, and has an arm, 53, extending through a hole in its other end, havinga platform, 47, extending out from its upper end, adapted to receive the pieces of wire 46 as they are discharged from the point- The arm 53 may be adjusted up or down in the lever 50 by means of asetscrew, 5t. The lever 50 has a stud, 55, secured thereon, on which is a roll, 56, adapted to travel on a cam, 57, secured on the outer end ofthe shaft 11, and to cause the lever 50 and the push arm 53 to be forced down at the proper time against the action ofthe spring 58, secured at one end to the bed 2 and at the other end to the lever 50, preparatory to the delivery of a pointed piece of wire, 46, from the pointrolling dies onto the platform 47 of the arm 53.

The continued revolution of the cam 57, which revolves with the die 13, allows the spring 58 to act to force up the lever 50 and the arm 53 and cause the piece of wire 46,'supported on the platform 47, to be pushed up into the action of the screw-thread rolling dies, after which the lever 50 returns to its first position, (shown in Fig. 3,) and this operation is repeated every time that a piece of wire is discharged from the point-rolling dies. After passing between the screw thread -rolling dies the finished double-pointed screwthreaded pieces of wire 59, Fig. 10 are dis charged or dropped into a suitable box or receptacle placed to receive them.

The operation of the machine shown will be readily understood by those skilled in the art from the above description, in connection with the drawings.

First, a continuous length of wire of suitable size, according to the desired size of the threaded pieces of wire to be made, is fed into the machine at regular intervals by the mechanism hereinbefore described operating intermittently.

Second, the wire is cut off on a bevel in lengths required for the pointed pins or threaded pieces ofwire by means of a cutter-bar operated at regular intervals by mechanism hereinbefore described.

Third, each piece of wire cut off is fed forward into the action of the dies for rolling the points on the ends thereof, having been first placed in its proper position to pass freely between the point-rolling dies, and is carried around by the revolution of the circular pointrolling die in the manner hereinbefore described. I

Fourth, each piece of wire, having been pointed at each end, is fed into the action of the screw-thread-rolling dies, having been first placed in its proper position as it is thrown out from the point-rolling dies to pass between the dies for rolling a screwthread thereon, and carried around by the revolution of the circularthread-rolling die in the manner hereinbefore described.

It will thus be seen that the machine shown is adapted to automatically manufacture in a continuous operation double-pointed screwthreaded pieces of wire of the description shown in Fig. 10 from a continuous coil or length of wire.

In Fig. 7 I have shown a modified way of supporting the stationary point-rolling and thread-rolling dies by means of a collar, 60.

mounted loosely on a screw-bolt, 61, secured in the bed 2, and a stud, 62, secured in the upper end of the die-block 33 and extending through an arm, 63, of said collar 60, and a strong spring, 64, encircling the stud 62 and interposed between the arm 63 of the collar and the top of the die-block 33.

The object of the spring 61 is to furnish a yielding support for the dies, so that the same may move upward in case of a piece of wire not passing in between the dies in a proper manner, or two pieces being forced in one upon the other, and thus prevent the breakage of of the machine.

It will be understood that the details ofeon struction of the machine shown may be varied somewhat, if desired.

Instead of making pins or pieces of wire wit-h a point rolled on both ends thereof, pins with a point rolled only on one end may be made by simply changing the shape of the recess in the point-rolling dies; and long or short points may be rolled, as desired, by changing the bevel on which the wire is cut off and the bevel of the point-rolling dies.

In case it is desired to manufacture only the plain pins, or pieces of wire with a point rolled on one or both ends thereof, then the threadrolling dies and mechanism connected therewith may be dispensed with.

I have shown in the drawings and described a revolving circular die in connection with a stationary die for-rolling the points on a piece of wire; but the same result may be reachedthat is, the rolling of points on pieces of wire-.-

by employing dies having a longitudinal plane surface and with their contiguous faces recessed and beveled in the same manner as the circular dies shown.

The circular point-rolling die 12 is represented in the drawings made in one piece. If 1 preferred, the beveled walls or rims may be .made separate and secured to the central part of the die. The face of the central part of the die 12 maybe slightly grooved or roughened to prevent the pieces of wire carried around by the revolution of said die from slipping on the face thereof.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine for manufacturing pointed screw-threaded pieces of wire, astationary die and a revolving die having their contiguous faces recessed and beveled to correspond with the desired bevel of the point to be rolled on the pieces of wire passed between said dies, in combination with a stationary die and a revolving die having their contiguous facesscrew-threaded to roll a screw-thread on the pointed pieces of wire passed between them, substantially as shown and described.

2. In a machine for manufacturing pointed screw-threaded pieces of wire, the combination, with a clamping device for gripping a continuous length of wire and drawing it forward into the operation of the machine, a supporting-platform for the wire, and a cutter for cutting off the wire on a bevel, ofthe point-rolling dies, one stationary and the other rotary, having their contiguous faces between which the pieces of wire cut off and to be pointed pass recessed and beveled, and the screwthread rolling dies, one stationary and the other rotary, having their contiguous faces between which the pointed pieces of wire pass screw-threaded, all constructed and operated substantially as shown and described.

3. In a machine for manufacturing pointed pieces of wire, the combination, with mechanism consisting of a lever carrying a push-pawl pivoted thereon for feeding pieces of wire into the action of the point-rolling dies, said lever operated by a cam on the shaft of the rotary point-rolling die in connection with a spring, of the point-rolling dies consisting of a sta tionary and rotary die having their contiguous faces between which the pieces of wire pass recessed and beveled, and a verticallymoving stop-bar mounted over the rotary die, with its lower end beveled and extending in the path of the above-mentioned push-pawl, for the purpose stated, substantially as shown and described.

4. In a machine for manufacturing pointed screw-threaded pieces of wire, the combina tion,. with the stationary and the rotary pointrolling dies having their contiguous faces bepoint-rolling die, with its lower end bent and extending directly in the path of the pointed pieces of wire as they are discharged from between the point-rolling dies, for the purpose stated, ofmeehanism consisting of a verticallymoving platform, upon which the pointed pieces of wire are discharged, adjustably supported upon a lever, for feeding the pointed pieces of wire into the action of the screwthread-rolling dies, said lever operated by a cam on the shaft of the rotary screw-threadrolling die in connection with a spring, and the screw-threadrolling dies consisting of a stationary and a rotary die having their contiguous faces between which the pointed pieces of wire pass screwthreaded, all constructed and operated substantially as shown and described.

5. The improved mechanism for pointing and screw-threading pieces of wire in a con tinuons operation, consisting of dies having their contiguous faces recessed, with beveled walls corresponding to the desired bevelof the point to be rolled on the pieces of wire passed between said dies, in combination with dies having their contiguous faces screw-threaded volving circular die having its face recessed and beveled, of a stationary die having its end recessed and beveled to correspond with said revolving ci reular (lie, and between which dies the pieces of wire to be pointed are passed to have a point rolled on the ends thereof, substantially as set forth.

7. The improved mechanism for pointing the ends of pieces of wire cut on a bevel, consisting of dies having recessed faces, with bev eled walls corresponding to the desired bevel of the point to be made on the pieces of wire which are passed between said dies to have a point rolled on the ends thereof, substantially as set forth.

ANDREW H. HAMMOND.

Vitnesses:

JOHN C. DEWEY, M. RALPH DRYDEN. 

